I sent in payment last week, and Joe recently informed me that they are still working on the power transformer for 110-120V AC. Hopefully, they'll get it sorted out soon. For anyone who has received their unit from Suppa and tried it out, please share your initial impressions.

It looks like BOI Audioworks has decent prices on matched pairs of the 6N1P-EB (EV) driver tubes and on matched quads of the JJ Tesla EL84 (6BQ5) power tubes. The tube shown in the photo is the Voskhod (rocket logo) 6N1P-EB, which has received praise on many user forums.